Boot-nailing machine



Sept. 28 1926. Y

' W. COERPER Boof NAILING MACHINE Filed sept. 3o. 1924 4 Shoots-Sheet 1FigZ.

/nentar WM Sept. 28 1926.

w. COERPER Boo; NAILING MACHINE Filed sept. so. -1924 4 Sheets-Sheet 2MHHHHHHH Fig. (D---D Sept. 28 1926.

W. COERPER BOOT NAILING MACHINE 4 Shoots-Sheet. 5

Filed Sept. 30, 1924 .w Em M Sept. 28 1926. W. COERPER BooT NAILINGMACHINE 10a /m/entor:

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Unirse vsrarss PATENT OFFICE.

WILHELM COERPER, OFY BERLIN- ADLERSHOF, GERMANY.

Boor-MAILING MACHINE.

Application led September 30, 1324, Serial No. 740,812, and in GermanyAugust 16, 1922.

This invention relates to a boot nailing machine. h'lachines of thistype were fitted hitherto either with a horn or with a holder for aniron last. In'fthe machines fitted with a horn the conveying of the bootwas effected by an awl stuck into the sole. The conveying can howevernot be effected in this manner when the machine is fitted with a lastsupport as at the conveying of the comparatively heavy last support theawl breaks, being adapted merely to convey he unloaded boot. The drivingdevice for the horn is in machines of this type not capable of executingsuch a long stroke that it would be possible to substitute without anymodification a last holder for thehorn.

The machines with last holder of known type are not adapted for thenailing by means of a horn as the feeding is in such machines generallytted with the fabric presser arranged for one side only so that when ahorn would be substituted for the last holder' the boot would tilt onsaid horn. rlhere does consequently not exist a practical boot nailingmachine which is capable of working perfectly either with a horn or witha last holder. 1

The boot nailing machine according to my invention is designed to fillthis gap.

The machine according to thev invention can be used either with a lastholder or with a horn. The feeder of the machine has a two-sided foot,known per se, and the carrier which supports either .a last holder or alhorn is adapted to executea long stroke.

An arbor is preferably arranged so that it bears on the carrier for thelast holder or the horn and engages with the hollow shaft of the lastholder or the horn, rod being hingedly connected with said arbor, by theraising of which rod in La mann 4r similar to a crowbar, the last holdervor the horn is temporarily raised, the carrier being simultaneouslysecured in its position in order to press during the working of themachine the work against the nose of the fastener inserting mechanism.The machine accordingto the invention is specially adapted to be used inbootanakers workshops in which alternately boots are made and repairsare erzecuted. .he horn is best adapted for Inaking new boots. This horncan however be used with advantage for repairing boots the welt of whichis still undamaged and smooth and further for repairs of top boots as itis difficult to accommodate the top on the last holder below the last.The nailing on lasts or the use of the last holder' is necessary howeverwhen the bad state of the welt does .not permit of a perfect feeding ofthe boot on the horn, When machines of this type are to be used fornailing in two rows the feed foot is preferably controlled by a bushoscillatable around a bolt with the aid of a cam and adapted to bedisplaced on said Y bolt in axial direction by means of a capstan It hasfurther been found out that whenV the feed foot, as has been hithertousual in last holder machines, has an oscillating movement, namely amovei'nentY along a curved line, the selective use of a universaloscillatable last holder or of a horn movable only in vertical directionwas not possible for the nailing or that at least when the horn wasbeing used, defects in the feeding of the shoe occurred. Theseinconveniences are avoided when, according to the invention, the feedfoot of the machine executes at first a straight lined downward movementand then a straight lined movement in lateral direction. The feed footis vertically moved downward by means of a ram acting upon a slidingsurface of thefeed foot, whereupon it is moved in lateral `direction bymeansl of an oscillatable .arm with which the feed foot is vconnected bya bolt engaging with a longitudinal slot. The feed foot may be guided,with this object in view, by means of horizontal cross slots on the ramwhich is vertically guided.

In order that in the -endposition any play of the feed foot, andresulting therefrom, an inaccurate nailing be avoided, a lever arm whicheffects the lateral movements of the feed foot may 6be fitted with aprecisely worked curved face, which curved face holds the feed foot inits final position without play in contact with the other Iguidingmeans, for instance the bolt. Y

In order that at a working of the machine breakage of hammer or awl belavoided as far as possible,rwherefromtroublesome interruptions of theworking would result, the hammer and awl, which with the object in viewof becoming alternately operative, are mounted in an oscillatable guidepiece can, according to the invention, be guided at the upper end in theoscillatable frame which essentially is of a height corresponding to thelength of hammer and awl, by means ot the tool holder in longitudinalguides of said oscillatable frame and at the lower end by engaging witha lower plate ot said oscillatable frame so that the hammer and awl areconsequently, in opposition to the commonly used arrangements,not guidedonly in two places, but in three places. The double gui-ding in thecommonly used machines is effected by the tool holder and the plungersituated directly above the tool. he third guiding is situated when thetool is penetrating into the work, approximately at the centre of thetool, so that even in cases in which the work opposes considerableresistance to the penetration oit the tool a breaking or bending of' thetool need not be feared. This arrangement ensures further a low buildingheight. It is advantageous to arrange the last holder according to theinvention in a plane perpendicular to the longitudinal axis of the lastand inclined with regard to the shaft as with such arrangement the nailspenetrate into the sole obliquely with regard to the edge ot the soleand consequently have a more solid hold in the sole. wWith this objectin view the shaft which carries the last holder can be bent and directlybelow the last holder a ball-joint can be arranged adapted to be lockedby means of a cap nut in order to permit of varying atl will the angleof inclination of the last holder.

An embodiment of the invention is shown, by way of example, on theaccompanying drawings, in which Fig. 1 is a side elevation of themachine, partly in longitudinal section.

Fig. 2 is a front elevation of the machine.

Fig. 3 shows a side elevation, partly in section the horn mounted on thecarrier.

Fig. 4 shows on enlarged scale the machine head in longitudinal section.

Fig. 5 is a front elevation of Fig. 4.

Fig. 6 is a longitudinal section on line D-D of Fig. 4.

Fig. 7 is a view from below of the conveyor embracing the nose piece.

Fig. 8 is a section on line A-A of Fig.

Fig. 9 is a section on line B-B of Fig. 5.

Fig. 10 is a section on line C-G of Fig. 5.

Fig. 11 shows in front elevation the cam disk for the frame carrying theawl and hammer. l

Fig. 12 is a section on line E-E of Fig. 4.

Fig. 13 shows in plan view the cam disk shown in Fig. 11 which servesfor operating the knife which cuts the single wooden pegs.

Fig. 14 is a section on line F-F of Fig. 4.

.15 shows in pla-n view the capstan wheel shown in Fig. 14.

Fig. 16 is a section on line G-G of Fig. 4.

Fig. 17 is a rear elevation of the conveyor on larger scale.

Fig. 18 is a side elevation of Fig. 17.

Fig. 19 is a section on line L of Fig. 17.

Referring to the drawings the machine consists of a column a with headl) contain ing the driving gear for the nailing machine and o1c the workholder c. rEhe rod 1 of the work holder c has threaded extension 2 atthe lower end on which a nut 3 is adjustably mounted. This nut 3 isconnected by springs 4 with the .trarne of the machine and by a link 5with the pedal lever G. The. springs 4 press the rod 1 and consequentlythe last holder l or horn f mounted on said rod normally in upwarddirection so that the boot mounted on the last holder or on the horn ispressed against the machine head. rlfhe pedal lever G serves for pullingthe boot away from the machine head with a long stroke in order toenable the adjusting of the boot or any other manipulations. On the rod1 either the last holder CZ or the horn j may be mounted. The lastholder consists of the shaft 7 which is hollow at its lower end and bentso that its upper part is inclined at an angle towards the lower part.On a stud 8 in the upper end of shaft? the extension piece 9 is mountedwhich has a bow-shaped cavity in its end designed to receive the bolt 10of a plate 11 which carries the supports 12- tor the last. Theconnection between the extension piece 9 and the plate 11 or t-he bolt10 is ensured by means ot a cap nut 13. ln the ball joint formed in thismanner the plate 11 and with the saine the supports 12 tor the last maybe adjusted at any desired angle with regard to the shaft 7 or to therod 1.

On the bush 14 ot the working table 15 which serves to'guide trie rod 1an angle lever 16 is pivotally mounted the shorter arm 17 of which hasa`screw 18 engaging with the rod 1. The end of this screw 18 is normallynot in contact with the rod` 1. It however the pull rod 19 hingedlyconnected with the end of the longer arm of lever 16 is moved upward bythe action ot the cam 20 the arm 17 is moif'ed. toward the rod 1 andclamps this rod in the bush 14. This clai'nping action takes placeduring the working period proper ot the machine, that is. during theworking of awl and hammer. |llhe rod 1 is securely Fixed in its positionby this clamping action so that a rigid abutment is produced instead ofthe elastic counter pressure.

A lateralv arm 19 of the pull rod 19 serves to operate a lever 21 in thetree end of which a bolt 22 is hingedly mounted. rllhis bolt 22 isinserted between the upper face of rod CII lll)

l which is also balleshaped .and the bottom of the bore of theshaft 7.llVhe-n, through the intermediary of the pull rod 19 or its arm 19, thelever is raised it .acts lilro a -crowbar upon the shalt 7 in raisingthe saine, whereby7 'the rod l being secured in its posi: tion, thepressure .of the sole ot the h o against .the nose g is increased.

Instead of the last holt er Z tin (Fig. 3) may be mounted on f' d i.clamping lever 16 works also when the is being used.

The machine is driven either by power means or, as shown .on the` drawiimeans of the pedal lever 23 which against the action of spring 24 .actsupon the connecting rod 25 and through this .connecting rod upon the flywheel 26 which is lre if upon the driving shaft 27 ot the driving gear.

The driving shatt 27 carries at its trent end the cams 28 (Figs. 4 and5). These cams act upon kabutments 29 which in Fig. 4 are shown in dashand dot lines and in Fig. 5 in full lines. The abutments 2Q of thehammer rod 30 are thus raised agr-inetthe action of the spring 3l. Vihenther cams 28 continue to rotate the ha. er rod de scends under theaction of spring 3l. As shown in Fig. 4 two pairs ot cams are arranged,one in front of the hamm r rod and the other behind said hammer rod. Therearward pair ot cams serve to raise the hammer rod. The backs ot thecams the front pair areof such shape that the downward movement tairesplace uniformly and at the desired speed. At the downward movement theabutment 29 remains perinanently in contact with the frontk cams 28 sothat no beating noise is produced.

As for raising the hammer rod 30 cams 28 are arranged this hammer israised and lowered twice at each revolution of the shaft. At one ofthese movements the hammer rod is coupled with the hammer and at theother movement it is coupled with the awl through the intermediary ofthe mechanism which will be hereinafter described.v The mechanism 7L(Figs. 4, 5 and l0) serves for the `coupling and uncoupling. 0n the 32frame is oscillatablv moi ed. This trame comprises two guide rods 34 onwhich carriages 35 are guide-d so that they Acannot rotate but move inaxial direction.

These carriages 35 carry respectively the hammer 36 and the awl 3'?. p

The lrame 33 has teeth on its rear surface with which engages a raclr38.hhis rack 38 is moved to and tro by means ot av lever 39 (Figs. 4 and 6)oscillatablv mounted on the machine frame as the roller 4l ot said leverengages with the curved groove of the cam disk 42 mounted on the drivingshaft 27. By this reciprocating movement of the rack 38 the frame isrocked. In the one end position a nose`43, (Figs. -lO) of .the car-Vriage 35 which carries th hammer 36 enment with the indentation 44 andthe nose 45 oit the other carriage 35 for the awl 37 g.. an indentationoi the hammer rod 30. In the one end position ot traine 33 the hammerand in the other end position of the trame the awl is therefore coupiedwith the hamn" r rod. The hammer and awl are guided three toit. duringthe entire worl L the guide rods 34, at the middle in plate 4'? of theframe and at t e end in the square hole ot the nose g. tools aretherefore well protected against breaking and bending.

rIhe peg-wood 47a designed tor the nailins is conveyed by the milledwheel (Figs. 'G and 8) which presses the peg-wood 47a against theguiding roller rilhe pegwood bcbbin is so mounted.y that the directionor the strip entering the machine is parallel to the plane in which theaxes ot counter-pressure roller 49 and guide roller 50 lie, so that thewood suffers no furtherbending in the machine. The milled wheel 48 isrigidly connected with a pinion 52 (Fig. 5) by means of an axle 5l. Alocking pawl 53 controlled by a spring acts pon said pinion 52 andprevents the back rotation ot the saine. The rotation of the pinion 52in forwart direction is pr-.duced by a pawl 55 which, against the actionot a pring, is oscillat-ably mounted on a lever 56 and pressed by saidspring` if ch is not shown on the drawing, the pinion 52. The lever 56is oscillated by the cam 57 around the fulcrum 58 so that the pawl 55rotates the pinion 52 and consequently the milled wheel 48 in forwardrliriction. rlhe peg-wood guide is closed at the front end by the lidcomposed ot two parts and GO (Fig. 8). The two parts 5S and 6G oi' thelid are pivotably mounted on tl bolt 6l. The bolt 6l carries the guiderc. A screw G2 serves "for securing l its position and a catch 63 s ingthe part 59, said catch be.- I mounted at 54 on the part anc. cI in itsfree end the set screw C15 by m .i which the pressure exerted by n.roller 49 on the peg-wood 47 can be i lated. lhen a Adisturbance occursin guiding of the peg` wood i n to oscillate the catch 63 bac notounscrew the screw in order to render the box accesible which containsthe peg wood.

The knife 66 which serves for cutting eti the peg from the peg` woody4'!"a is hingedly connected with a lever by means ot a block 67 (Fig. Areciprocating oscilla ingl movement is communicated to this le ereneages with ie .ler

stroke, viz, at the upper end on he lower lill ' 89 of a bush 91 68through the intermediary of a. rod 69 (Figs. l, 6 and 12) the roller 70of which engages with the curved groove 71 of the cam disk 42.

rEhe work must be displaced at the singlerow nailing in the direction ofthe row after each stroke of hammer and awl and at the two-row nailingonce in the direction of the row and then transversely to thisdirection. A feed foot 72 (Figs. 4t, 7, 17) serves for controlling thismovement of the worl. rl`he feed foot 72 has lateral abutment 7 3 andtwo toothed pressure pieces 74: arranged at either side of the nose get, 0, 7,

rlhe ram 75 for the feed foot 72 is gui by means of blocks 70 inv-rtical groo lfe of the machine head and further by Ai of bolts 79engaging with slots 7 8. Spriii S0 (Figs l and 0) have the tendencybring the ram into its upper position. ram is moved in downwarddirection aga the action of said springs by a cam o the driving shaft27. The lower end of the ram 7 5 bears ou the face 82 of he feed foot72.

The feed foot 72 or a flap bent ofi' at right angles is mounted inovabivin horizontal direction on the plate S/l which for the end of the rain75. The feed foot is guided by means of screws 90 engaging withlongitudinal slots S5.

he flap 83 carries a screw 87 which engages with a longitudinal. slot 88of the arm rotatable around a bolt 90 screwed into the machine head. Anupwardly directed arm 92 Il) of bush 91 with which a spring 99 isconnected cooperates with the cam 9d of the driving shaft 27 in such amanner that the arm 92, the bush 91 and the arm S9 of this bush areperiodically7 swung out.

A bolt 95 is rigidly connected with the 'end of the bolt 90 and thecapstan wheel 97 is rotatably mounted with its bush 95 on said bolt 95.The capstan wheel is periodically rotated by a cam 98 of the drivingshaft 27.

An eccentric 99 connected with the bush 90 of the capstan wheel 97 actsat the rotation of the capstan wheel upon the face 100 of bush 91whereby this bush is shifted in axial direction on the bolt 90. The feedfoot 72 participates in this axial displacement. rlhe axial displacementis utilized at the two-row nailing in order to pass periodically fromone row of nails to the other row of nails.

rlhe cam 98 is rotatably mounted on the driving shaft 27. it the side ofthis cam 9S a ring 101 is rigidly fixed on this shaft. A bush 102,arranged at the side of the ring 101, has pins 103 which traverse thering 101 in axial direction. In the position shown the pins penetrateinto bores of the cam 98 and couple the cam with the ring 101 and conseqently with the driving shaft 27. ln the side wall of the frame a lever104C is pivotally mounted with the aid of a bolt 105 and carrieseccentrically a stud 106 which traverses a slot of the wall of thecasing and engages with an annular' groove 107 of bush 102. 1n theposition of the lever 104 shown in the drawings the cam 98 is coupledwith the driving shaft 27. lVhen however the lever -1L is oseillated indownward direction its stud 106 d aws the bush 102 along` so that thepins 108 disengage from the bores of the cam 99 so that this cam isstopped. The axial movement of the bush 91 ceases and the machine isadjusted for single-row nailing. The operation of the feed foot is asfollows z- By the cam 81 the ram 7 5 is at first pushed downward so thatit descends vertically tolQjether with the feed foot 72. At this timethe screw bolt S7 moves 1n the longitudinal slot 88 of arm 89 of thebush 91. As soon as the feed foot has arrived at its extreme lowerposition the cam 94 maires the arm 92 and the bush 91 and consequentlythe arm 99 of this bush swing sideward. The feed foot i.; tliuslaterally displaced on the plate SH1- cf ram 7 and the boot mounted onthe horn or on the last iolder is consequently fed for a distancebetween two nails.

rlhe ram 75 rises again and with the saine the feed foot 72 so that thefeed foot comes out of engagement with the boot. At tworow nailing thecapstan wheel 97 begins now to operate. lt shifts the bush 91 and withthe same the feed foot 72 in the longitudinal direction of the bolt 90whereupon the above-described operation starts. In order to eliminatethe idle run at and after the lateral movement and consequentlyinaccuracies in the adjusting of the feed foot 72 the amY 89 of the bush91 has a projection 10S which is vaulted and accurately shaped in sucha. manner that itV presses the feed foot 72 in its end position withoutplay against the other `guide elements. viz; against the screws 86. Thereturn of the feed foot 72 into the initial position is effected throughthe action of the spring 109.

The amplitude of the oscillating movement of the bush 91 around the stud90 may be adjusted by means of a screw 110 (Fig. 12). This screw limitsthe baclr movement of the arm 92 caused by the spring 93. The distancebetween two nails is altered by the amplitude of oscillation of thelever 92.

The awl and the hammer are at rest during the movements vof theconveyor.

l claim z- 1. A boot nailing machine comprising a .feed foot, a holt, abush for controlling said feed foot mounted for oscillation on saidbolt, a cam movable around said bolt for operating said bush, a capstanwheel for operating said cam, and cam means for operating said capstanwheel.

2. In boot nailing machine of the type described, a mechanism forchanging from two row to single row nailing, comprising means forshifting a shoe laterally during the nailing operation, a capstan wheelfor operating said shifting means, a drive shaft, a cam for operatingsaid capstan wheel loosely mounted on said drive shaft, and aclutch forclutching said cam to said drive shaft. y

3. A. boot nailing machine comprising in combination a verticallymovable push rod, a feed foot mounted on said push rod by means of pinsand horizontally extending slots, a rockable arm, and a connectionbetween said arm and said feed foot consisting of a pin on said feedfoot and a vertical slot on said arm.

i. A boot nailing machine comprising in combination a vertically movablepush rod, a feed foot mounted on said push rod by means of pins andhorizontally extending slots, a ioclrable arm, and a connection betweensaid arm and said feed foot consisting of -a pin on said feed foot and avertical slot on said arm, and a precisely worked curved pressing faceon said ioclrable arm ldesigned to hold said feed foot in its endposition against said guiding pins wit-hout play.

5. A boot nailing machine comprising a feed foot having a longitudinalslot, a ram acting on said feed foot for moving the same verticallydownward, a bush, a cam for operating said bush, a lateral arm o-n saidbush, and a piu on said arm engaging the slot in said feed foot forcommunicating straight line lateral movements to the feed foot.

6. A boot nailing machine of the type described comprising incombination a feed foot, a cam and push rod for depressing said feedfoot, a plate at the lower end of said push rod having vertical slots,pins projecting through said slots for guiding the lower end of saidpush rod, yand a flap on said feed foot projecting at right anglesthere-- from and having horizontal slots, and pins on said plateprojecting through said horizontal slots.

7. A boot nailing machine of the type described comprising incombination with a feed foot having a longitudinal slot, a ram actingupon the upper face of said feed foot for moving the same verticallydownward, a bush, a cam for operating said bush, a lateral rockable armon said bush, a pin on said arm engaging with said longitudinal slot ofthe feed foot for communicating to said feed foot a straight linemovement in a lateral direction, guide bolts for said feed foot, and aprecisely worked curve-shaped pressing face on said rockable lateral armdesigned to hold the feed foot in its end position without play againstsaid bolts.

8. In a boot nailing machine of the type described hammer, an awl, arockable guide for the hammer and awl, comprising a rockable frame, twoguide rods on said frame, a carriage movably guided on each guide rod,said hammer being' mounted on one of said carriages, said awl being.mounted on the other carriage, a hammer rod, means for rocking saidframe to and fro to couple either the hammer or the awl carriage withsaid hammer rod, a lower plate on said frame in which the hammer and awlare guided, and va nose under the frame having a square hole for guidingsaid tools.

9. In a boot nailing machine of the type described, means for feedingpeg wood comprising a counterpressure face for the peg wood, saidcounterpressure face being composed of two parts, a common pivot boltfor said two parts, and an adjustable catch for locking at least one ofsaid parts in its posit-ion.

In testimony whereof I aiiix my signature.

WILHELM COERPER.

